Can someone tell me the answer and the reason

frictional force Ff is less than applied force.

Explanation:

the case belongs to equilibrium, acc to that if the sum of forces acting on a body is zero than the body is said to be in a state of equilibrium.

Since force of gravity is balanced by normal reaction and if applied force increased to the frictional force then the body will start moving in the direction of force.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.